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<table width="100%" summary="page for koch"><tr><td>koch</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Ordinal Data from Koch</h2>

<h3>Description</h3>

<p>The <code>koch</code> data frame has 288 rows and 4 columns.
</p>


<h3>Usage</h3>

<pre>data(koch)</pre>


<h3>Format</h3>

<p>This data frame contains the following columns:
</p>

<dl>
<dt>trt</dt><dd><p>a numeric vector</p>
</dd>
<dt>day</dt><dd><p>a numeric vector</p>
</dd>
<dt>y</dt><dd><p>an ordered factor with levels:
<code>1</code> &lt; <code>2</code> &lt; <code>3</code></p>
</dd>
<dt>id</dt><dd><p>a numeric vector</p>
</dd>
</dl>



<h3>Examples</h3>

<pre>
data(koch)
fit &lt;- ordgee(ordered(y) ~ trt + as.factor(day), id=id, data=koch, corstr="exch")
summary(fit)
</pre>


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